I have the feeling that part of the leaner meaner, but yet more full featured, chess.com is the dissapearance of that feature. In the browser they tried to hide it under "custom" and made you reset for each game. Now I just think it's going away and everyone will use the same seek algorithm. I've been proven wrong more than a few times though...
Oh the live chat rooms have been gone for what? A year or two maybe; Moderating them was apparently a real pain.
It used to be on here that you could set a narrower rating range for live game requests, other than the default of -200 to 200. I can't see how or where to do that anymore. I'm using the latest version of the non-classic Android app. I couldn't find how to do it with classic, either. Also, what happened to live chat rooms? I've been a user here for years.